Replacing an existing breaker

• 1). Shut off power to the service panel through the main breaker.
  
  
• 2). Remove the old 220/240-volt breaker by unclipping it from the hot bus bars and disconnect the wires from the old breaker.
  
  
• 3). Connect the hot and neutral wires from the circuit to the setscrews on the GFCI breaker. A third neutral wire, called the pigtail, remains to be connected.
  
  
• 4). Connect the pigtail to the neutral bus bar.
  
  
• 5). Clip the breaker into place on the hot bus bars.
  
  
• 6). Restore power to the service panel and test the new GFCI by pushing the test button. The breaker should trip.
  
  

Adding a new GFCI-protected circuit

• 1). Make sure your box can accept another 220/240-volt circuit before beginning any work. There must be two adjacent unused spaces in the service panel.
  
  
• 2). Turn off the power to the circuit breaker box.
  
  
• 3). Remove the cover from the empty spaces in the service panel where you will be adding your new breaker by popping them out with your screwdriver.
  
  
• 4). Connect the breaker as described above.